What Are The 4 Types Of Bolt Heads?

Bolt heads are an important part of fastener assemblies and come in a variety of styles and materials. Each type of bolt head serves a particular purpose, and understanding the four common types of bolt heads can help you choose the right fastener for your application.

The most common type of bolt head is the hex head. Hex heads are used in most construction and general assembly applications and are easily identified by their six-sided shape. These bolts usually have a threaded shank which is designed to fit into a pre-tapped hole. Hex heads come in a variety of sizes and materials, and are usually the most cost-effective choice when choosing a fastener.

 

The second type of bolt head is the socket head. Socket heads are designed with a hexagonal socket in the center of the head, which is designed to accept a socket wrench. Socket heads are often used in applications where there is limited space because they have a smaller profile than hex heads. They are also used in applications where precise adjustment is required.

 

The third type of bolt head is the flat head. Flat heads are designed with a flat top and a cylindrical shank. These bolts are most commonly used in applications where the head of the bolt must be flush with the surface. Flat heads come in a variety of sizes and materials, and are available with a variety of drive options.

 

The fourth type of bolt head is the button head. Button heads are designed with a rounded, domed top and a cylindrical shank. Button heads are used in applications where the bolt must protrude above the surface. These bolts are often used in applications where a decorative finish is desired.

 

Understanding the four common types of bolt heads can help you choose the right fastener for your application. Hex heads are the most common and cost-effective choice, while socket heads are best for applications where there is limited space or precise adjustment is required. Flat heads are designed to be flush with the surface, while button heads are designed to protrude above the surface. Each type of bolt head serves a particular purpose and selecting the right one can make all the difference.